DTC P2124:00 [MZ-CD 1.6]


id0102g8105200

DTC P2124:00

Accelerator pedal position (APP) sensor No.1 circuit intermittent

DETECTION CONDITION
•  The PCM monitors the accelerator pedal depression amount using the duty signal from APP sensor No.1. If the PCM detects that the APP sensor No.1 is less than 0.2 V or more than 4.8 V, the PCM determines that the APP sensor No.1 circuit malfunction.
POSSIBLE CAUSE
•  APP sensor connector or terminal malfunction
•  Short to ground in wiring harness between ENG fuse and APP sensor terminal F
•  ENG fuse malfunction
•  Open circuit in wiring harness between APP sensor terminal F and ignition switch (IG1)
•  PCM connector or terminal malfunction
•  APP sensor No.1 signal circuit and power supply circuit are shorted to each other
•  Short to power supply in wiring harness between APP sensor terminal E and PCM terminal 120
•  Open circuit in wiring harness between the following terminals:
―  APP sensor terminal D and body ground
―  APP sensor terminal E and PCM terminal 120
•  APP sensor No.1 malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related service repair information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT APP SENSOR CONNECTOR CONDITION
•  Switch the ignition to off.
•  Disconnect the APP sensor connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 10.
No
Go to the next step.
4
INSPECT APP SENSOR NO.1 POWER SUPPLY CIRCUIT FOR OPEN OR SHORT CIRCUIT
•  APP sensor connector is disconnected.
•  Switch the ignition to ON (engine off).
•  Measure the voltage between APP sensor terminal F (wiring harness-side) and body ground.
•  Is the voltage B+?
Yes
Go to the next step.
No
Verify the ENG fuse condition.
•  If the fuse is blown:
―  Repair short to ground in wiring harness between ENG fuse and APP sensor terminal F.
―  Replace the ENG fuse.
•  If the ENG fuse is normal:
―  Repair for a possible open circuit.
Then go to Step 10.
5
INSPECT PCM CONNECTOR CONDITION
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 10.
No
Go to the next step.
6
INSPECT APP SENSOR NO.1 POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT TO EACH OTHER
•  APP sensor and PCM connectors are disconnected.
•  Switch the ignition to off.
•  Inspect for continuity between APP sensor terminals F and E (wiring harness-side).
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to each other, then go to Step 10.
No
Go to the next step.
7
INSPECT APP SENSOR NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
•  APP sensor and PCM connectors are disconnected.
•  Switch the ignition to ON (engine off).
•  Measure the voltage at the APP sensor terminal E (wiring harness-side).
•  Is the voltage B+?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 10.
No
Go to the next step.
8
INSPECT APP SENSOR NO.1 CIRCUIT FOR OPEN CIRCUIT
•  APP sensor and instrument cluster connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side):
―  APP sensor terminal D and body ground
―  APP sensor terminal E and PCM terminal 120
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 10.
9
INSPECT APP SENSOR NO.1
•  Reconnect all disconnected connectors.
•  Inspect the APP sensor No.1.
•  Is there any malfunction?
Yes
Replace the accelerator pedal, then go to the next step.
No
Go to the next step.
10
VERIFY THAT DTC P2124:00 TROUBLESHOOTING IS COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Run the vehicle under the FREEZE FRAME DATA stored condition.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
•  Perform the after repair procedure.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.